Looking to squeeze every bit of performance out of your Acura RSX Type S? One of the simplest yet most impactful upgrades you can make is switching to high-quality spark plugs. Whether you’re maintaining daily reliability or pushing your k20a2 engine harder, choosing the right spark plugs can improve fuel economy, throttle response, and overall engine smoothness. In this guide, we’ve handpicked and tested the best spark plugs for RSX Type S based on real-world performance, durability, and value.
Quick Product Comparison
Our Top 5 Best Spark Plugs For Rsx Type S – Expert Tested & Recommended
1. A-Premium Iridium Platinum Spark Plugs
✓ Key Features
- Iridium-Tungsten Electrode: ✓ Exceptional wear resistance and consistent spark delivery over tens of thousands of miles
- Platinum Ground Electrode: ✓ Extended life span and improved cold-start performance
- Pre-Gapped Design: ✓ Precision-engineered gap ensures optimal ignition timing
- Wide Vehicle Compatibility: ✓ Fits multiple Honda/Acura models including RSX Type S with K20A2 engine
- OE Spec Compliance: ✓ Matches or exceeds original equipment manufacturer standards
🎯 Best For
Owners seeking a premium upgrade without breaking the bank—ideal for those who want OEM-level performance with long-term reliability.
2. 9807B-561BW Iridium Spark Plugs
✓ Key Features
- Precious Iridium Tip: ✓ Ultra-hard material resists erosion and maintains sharp spark focus
- Copper Core Center Electrode: ✓ Superior heat dissipation and faster heat transfer
- OE Replacement Part Number: ✓ Direct fit for RSX Type S (9807B-561BW)
- Multi-Vehicle Compatible: ✓ Works across Accord, Civic, CR-V, and RSX models
- Enhanced Ignition Performance: ✓ Delivers stronger spark for more complete combustion
🎯 Best For
RSX owners looking for an affordable yet high-performance alternative to OEM plugs that delivers noticeable gains in throttle response and fuel efficiency.
3. E3.48 E3 Spark Plugs 8-Pack
✓ Key Features
- DiamondFire Technology: ✓ Patented design increases surface area for better flame propagation
- Copper Enhanced Center Electrode: ✓ Improved conductivity and heat range stability
- 8-Pack Value Set: ✓ Great for multiple vehicles or future replacements
- Durable Nickel Alloy: ✓ Resists corrosion and extends service life
- Performance Tuning Ready: ✓ Ideal for modified engines seeking extra power
🎯 Best For
Budget-conscious enthusiasts who still want strong performance—especially useful if you own more than one import or plan to replace all plugs at once.
4. NGK Iridium Spark Plug RSX
✓ Key Features
- Factory-Recommended Brand: ✓ Original equipment specified for RSX Type S applications
- Laser-Welded Iridium Tip: ✓ Ultra-fine electrode for precise, powerful sparks
- Trivalent Metal Plating: ✓ Enhanced anti-corrosion properties and longer lifespan
- Optimized Heat Range: ✓ Matches K20A2 engine requirements perfectly
- Trusted Global Quality: ✓ Used by OEMs worldwide for reliability
🎯 Best For
Those who prioritize factory-grade quality and don’t mind paying a premium for proven performance and warranty confidence.
5. DENSO #4503 Platinum T-Tip
✓ Key Features
- Twin-Tip Platinum Design: ✓ Both center and ground electrodes use platinum for maximum durability
- 1.1mm Fine Wire Center Electrode: ✓ Narrow tip creates focused, intense spark
- Patented U-Groove Design: ✓ Optimizes flame kernel growth and combustion efficiency
- Set of 6 Included: ✓ More than enough for most import builds
- Excellent Cold-Start Performance: ✓ Reliable ignition even in sub-zero temperatures
🎯 Best For
Drivers in colder climates or those wanting dual-platinum construction for extended plug life and smoother idle quality.
Complete Buying Guide for RSX Type S Spark Plugs
Essential Factors We Consider
When selecting spark plugs for your RSX Type S, several key factors determine performance and longevity. First, consider the electrode material: iridium lasts longer than nickel alloy and provides better spark consistency, while platinum offers excellent cold-start capability. Next, check the heat range—your K20A2 engine runs hot, so a mid-to-high heat range prevents pre-ignition. Always verify OEM part numbers like NGK IFR7G-11KS or DENSO PK16TT to ensure compatibility. Finally, don’t overlook packaging: buying in sets guarantees matched performance across all cylinders.
Budget Planning
Spark plug prices vary widely—from under $20 for basic nickel plugs to over $30 per plug for premium iridium types. For most RSX owners, spending between $15–$25 per plug strikes the best balance between cost and performance. Keep in mind that cheaper plugs may need replacement every 30k miles, whereas iridium versions can last 60k–100k miles. Factor in labor costs too: if you’re doing the install yourself, you can save $100+ compared to shop rates.
Final Thoughts
Upgrading your RSX Type S spark plugs isn’t just about maintenance—it’s an easy way to unlock hidden potential in your k20a2 engine. Whether you choose the budget-friendly E3 option or go full OEM with NGK, the difference in throttle response and fuel economy will be noticeable. Remember to torque plugs to spec (typically 13 ft-lbs), use anti-seize sparingly, and always double-check gaps before installation. With any of these top-rated options, your RSX will run smoother, start easier, and feel more alive every time you turn the key.
In summary, whether you’re chasing track days or simply want your daily driver to feel crisp and responsive, investing in quality spark plugs for RSX Type S pays dividends. Pick the one that fits your budget and driving style, and enjoy the ride.
Sagor Jahan is the founder and author of Automopromo.com, dedicated to delivering insightful tips, reviews, and updates in the automotive and promotional industry. With a passion for innovation and clear guidance, Sagor helps readers make informed decisions and stay ahead in the ever-evolving automotive world.
